diff --git a/src/theme/components/ion-checkbox.scss b/src/theme/components/ion-checkbox.scss
index 6fb4053a0..37e12ebd5 100644
--- a/src/theme/components/ion-checkbox.scss
+++ b/src/theme/components/ion-checkbox.scss
@@ -27,6 +27,10 @@ ion-checkbox {
         &.ios {
             opacity: var(--mdl-input-disabled-opacity);
         }
+
+        &::part(container) {
+            opacity: var(--mdl-input-disabled-opacity);
+        }
     }
 }
 
diff --git a/src/theme/components/ion-radio.scss b/src/theme/components/ion-radio.scss
index ebab14798..51d681179 100644
--- a/src/theme/components/ion-radio.scss
+++ b/src/theme/components/ion-radio.scss
@@ -68,6 +68,10 @@ ion-radio {
         &.ios {
             opacity: var(--mdl-input-disabled-opacity);
         }
+
+        &::part(container) {
+            opacity: var(--mdl-input-disabled-opacity);
+        }
     }
 }